Description
Overview
The Flowmaster American Thunder Cat-back Exhaust System is a complete, bolt-on upgrade engineered for 2000-2006 Toyota Tundra trucks equipped with the 4.7L engine. Built for the driver who wants a deep, aggressive exterior sound paired with a moderate interior tone, this American Thunder system delivers the performance improvements and unmistakable audio character that have made Flowmaster a trusted name in the exhaust world. It’s a DOR/DOS (Dual Out Rear or Dual Out Side) design, so you can dial in the exit style that matches how you drive.
Built to Perform
At the heart of the system is a Super 50 Series performance muffler, tuned to produce that signature Flowmaster growl without overwhelming the cabin. The exhaust flows through 16-gauge mandrel-bent aluminized steel tubing and a specially designed resonator, feeding into dual 2.50-inch aluminized steel tailpipes. Every bend is mandrel-formed to promote smooth flow, and the whole system is finished with a pair of large 3.00-inch polished stainless steel tips that add a clean, muscular look to the rear of your Tundra.
Two Tailpipe Exit Options
Flexibility is built in. Choose the tailpipe configuration that fits your needs: exit behind the rear wheels, which is ideal for towing, or route the pipes straight out the back under the rear bumper for an aggressive, muscular stance. Either way, the tailpipes use the factory hanger locations, making the fitment straightforward and keeping everything positioned exactly where it should be.
Easy At-Home Installation
This kit is designed to be installed in your own garage. It includes all necessary parts and hardware, along with long stainless steel clamps and an aluminum heat shield to complete the job. Because it bolts on and reuses the factory hanger locations, most enthusiasts can tackle the install without cutting or custom fabrication.
Emissions Legal & Backed
The American Thunder cat-back is an emissions-legal, CARB (California) compliant system, so it’s a smart choice for Tundra owners who need to stay street-legal. It carries Flowmaster’s 3-Year Limited Warranty. If you prefer all stainless steel construction backed by a Lifetime Limited Warranty, Flowmaster also offers a stainless version of this system.
- Fits 2000-2006 Toyota Tundra with the 4.7L engine (4WD)
- Super 50 Series performance muffler for deep, aggressive exterior sound and moderate interior tone
- 16-gauge mandrel-bent aluminized steel tubing with 3.00-inch inlet and a specially designed resonator
- Dual 2.50-inch tailpipes with large 3.00-inch polished stainless steel tips
- DOR/DOS design with behind-the-wheel (great for towing) or straight-out-the-back exit options
- CARB compliant and backed by a 3-Year Limited Warranty
Whether you’re towing, cruising, or just want your Tundra to sound as capable as it looks, this American Thunder cat-back brings proven Flowmaster engineering to your build.
